如何获取数组的第一个元素? [英] How to get the first element of an array?

问题描述

如何从这样的数组中获取第一个元素:

var ary = ['first', 'second', 'third', 'fourth', 'fifth'];

我试过了:

alert($(ary).first());

但它会返回[object Object].所以我需要从数组中获取第一个元素，它应该是元素 'first'.

解决方案

你为什么要用 jQuery 化一个普通的 JavaScript 数组?使用标准 JavaScript！

var ary = ['first', 'second', 'third', 'fourth', 'fifth'];警报(ary [0])；

来源，由 bobince

How do you get the first element from an array like this:

var ary = ['first', 'second', 'third', 'fourth', 'fifth'];

I tried this:

alert($(ary).first());

But it would return [object Object]. So I need to get the first element from the array which should be the element 'first'.

解决方案

Why are you jQuery-ifying a vanilla JavaScript array? Use standard JavaScript!

var ary = ['first', 'second', 'third', 'fourth', 'fifth'];
alert(ary[0]);

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array

Also,

Source, courtesy of bobince

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